Bio 226 Final Exam Questions With
Guaranteed Pass Solutions.
A farmer in Kansas and a farmer in California each plant an acre of the same kind of corn.
Because the environment differs for each field, how will this affect the height of their corn?
a. the average height of the corn could differ between fields
b. the variation in the height of the corn in each field could differ between fields
c. the color and see shape of the corn could differ between fields
d. both the average height of the corn and the variation in corn height within each field could
differ between fields
e. average height, variation in height, seed color, and seed shape could all differ between fields -
Answer d. both the average height of the corn and the variation in corn height within each
field could differ between fields
The concordance among identical twins for epilepsy is 37% and for fraternal twins 19%. From
this information, we can conclude that:
a. epilepsy has only a minor genetic component
b. epilepsy has an important genetic component
c. epilepsy has both and important genetic component and an important environmental
component
d. lifestyle and other environmental factors play an important role in epilepsy
e. epilepsy has only a minor genetic component, while lifestyle and other environmental factors
play and important role - Answer c. epilepsy has both and important genetic component and
an important environmental component
The phenotype of an individual results from an interaction between:
a. genotype & mutation rate
b. genotype & the environment
c. allele frequency & mutation rate
d. allele frequency & genotype
,a. 2
b. 3
c. 4
d. 6
e. 8 - Answer a. 2
Why do data on observable mutant phenotypes underestimate that actual frequency of
mutation?
a. many mutations are in non-coding regions of the genome
b. some mutations in protein coding regions of the genome are synonymous or silent mutations
c. most mutations result in death of the individual or and inability to reproduce
d. a & b are correct
e. all of the above are correct - Answer d. a & b are correct
In humans, ability to roll the tongue (R) is dominant to being unable to roll the tongue (r).
Having freckles (F) is dominant to having no freckles (f). A freckled tongue-roller could have
which of the following genotypes?
a. RRFF
b. RrFf
c. rrFF
d. both RRFF & RrFr are correct
e. all of the options are correct - Answer d. both RRFF & RrFr are correct
Consider Mendels experiments involving the trait around versus wrinkled peas. In some
experiments, Mendels method involved removing the anthers that produce pollen from the
flowers of the round peas and applying pollen from the anthers of the wrinkled plant. What
would have happened if Mendel had missed some anthers he was trying to remove from the
flowers of the plants that produce only round peas, and observed the peas produced by a plant
that had a mix of round and wrinkled pollen. (Indicate which of the following must be true)
a. the F1 peas produced would have mixed phenotypes
, e. the F1 peas would have phenotypes in a 1:1 ratio - Answer b. the F1 peas produced would
have a single phenotype
According to Mendel's work, a heterozygous plant with alleles Aa will produce:
a. gametes with only the A allele
b. gametes with only the a allele
c. gametes containing both the A allele and the a allele
d. 50% of the gametes with the A allele and 50% of the gametes with the a allele, on average
e. some gametes with the A allele and some with the a allele, but no predictable ratio - Answer
d. 50% of the gametes with the A allele and 50% of the gametes with the a allele, on average
If you crossed two heterozygous yellow seed pea plant (genotypes Aa):
a. the relative frequency of the a allele in each parents gametes would be 1/2
b. the relative frequency of the A allele in each parents gametes would be 1/2
c. the relative frequency of green seed plants (genotype aa) would be 1/4
d. the relative frequency of homozygous yellow seed plants (genotype AA) would be 1/4
e. all of the answer options are true - Answer e. all of the answer options are true
In pea plants, flowers are either white or purple; the purple color is produced by pigment called
anthocyanins. The production of anthocyanins is a two step process the first is controlled by the
C gene and the second by the P gene both genes must be produced functional proteins for
anthocyanin to be produced. For each gene, the dominant (C and P) alleles produce functional
proteins. You cross two pea plants, each with the genotype CcPp. What proportion of their
offspring will have purple flowers?
a. 13/16
b. 9/16
c. 7/16
d. 3/4
e. 1/4 - Answer b. 9/16
Guaranteed Pass Solutions.
A farmer in Kansas and a farmer in California each plant an acre of the same kind of corn.
Because the environment differs for each field, how will this affect the height of their corn?
a. the average height of the corn could differ between fields
b. the variation in the height of the corn in each field could differ between fields
c. the color and see shape of the corn could differ between fields
d. both the average height of the corn and the variation in corn height within each field could
differ between fields
e. average height, variation in height, seed color, and seed shape could all differ between fields -
Answer d. both the average height of the corn and the variation in corn height within each
field could differ between fields
The concordance among identical twins for epilepsy is 37% and for fraternal twins 19%. From
this information, we can conclude that:
a. epilepsy has only a minor genetic component
b. epilepsy has an important genetic component
c. epilepsy has both and important genetic component and an important environmental
component
d. lifestyle and other environmental factors play an important role in epilepsy
e. epilepsy has only a minor genetic component, while lifestyle and other environmental factors
play and important role - Answer c. epilepsy has both and important genetic component and
an important environmental component
The phenotype of an individual results from an interaction between:
a. genotype & mutation rate
b. genotype & the environment
c. allele frequency & mutation rate
d. allele frequency & genotype
,a. 2
b. 3
c. 4
d. 6
e. 8 - Answer a. 2
Why do data on observable mutant phenotypes underestimate that actual frequency of
mutation?
a. many mutations are in non-coding regions of the genome
b. some mutations in protein coding regions of the genome are synonymous or silent mutations
c. most mutations result in death of the individual or and inability to reproduce
d. a & b are correct
e. all of the above are correct - Answer d. a & b are correct
In humans, ability to roll the tongue (R) is dominant to being unable to roll the tongue (r).
Having freckles (F) is dominant to having no freckles (f). A freckled tongue-roller could have
which of the following genotypes?
a. RRFF
b. RrFf
c. rrFF
d. both RRFF & RrFr are correct
e. all of the options are correct - Answer d. both RRFF & RrFr are correct
Consider Mendels experiments involving the trait around versus wrinkled peas. In some
experiments, Mendels method involved removing the anthers that produce pollen from the
flowers of the round peas and applying pollen from the anthers of the wrinkled plant. What
would have happened if Mendel had missed some anthers he was trying to remove from the
flowers of the plants that produce only round peas, and observed the peas produced by a plant
that had a mix of round and wrinkled pollen. (Indicate which of the following must be true)
a. the F1 peas produced would have mixed phenotypes
, e. the F1 peas would have phenotypes in a 1:1 ratio - Answer b. the F1 peas produced would
have a single phenotype
According to Mendel's work, a heterozygous plant with alleles Aa will produce:
a. gametes with only the A allele
b. gametes with only the a allele
c. gametes containing both the A allele and the a allele
d. 50% of the gametes with the A allele and 50% of the gametes with the a allele, on average
e. some gametes with the A allele and some with the a allele, but no predictable ratio - Answer
d. 50% of the gametes with the A allele and 50% of the gametes with the a allele, on average
If you crossed two heterozygous yellow seed pea plant (genotypes Aa):
a. the relative frequency of the a allele in each parents gametes would be 1/2
b. the relative frequency of the A allele in each parents gametes would be 1/2
c. the relative frequency of green seed plants (genotype aa) would be 1/4
d. the relative frequency of homozygous yellow seed plants (genotype AA) would be 1/4
e. all of the answer options are true - Answer e. all of the answer options are true
In pea plants, flowers are either white or purple; the purple color is produced by pigment called
anthocyanins. The production of anthocyanins is a two step process the first is controlled by the
C gene and the second by the P gene both genes must be produced functional proteins for
anthocyanin to be produced. For each gene, the dominant (C and P) alleles produce functional
proteins. You cross two pea plants, each with the genotype CcPp. What proportion of their
offspring will have purple flowers?
a. 13/16
b. 9/16
c. 7/16
d. 3/4
e. 1/4 - Answer b. 9/16
